I have a few seedlings that I've had for 10 years just because they are different. Not pretty - but different.
I like working with things that don't look like anything else I have seen.
I made some crosses this year, but didn't harvest the seed. (bad girl!) I have done that every year for years. I did plant some in fall of 2011, and they are doing ok... so sooner or later I should see some bloom from them.